Socket in C#

private void loginb_Click(object sender, EventArgs e)
        {

            String username = this.textBox1.Text;
            String password = textBox2.Text;

            String server;
            if (username.Equals("Lolmewn"))
            {
                server = "localhost";
            }
            else
            {
                server = "77.251.20.228";
            }
            //start connecting
            Encoding ASCII = Encoding.ASCII;
            Byte[] RecvBytes = new Byte[256];
            IPEndPoint hostEndPoint;
            IPAddress hostAddress = null;
            int conPort = 3456;

            // Get DNS host information.
            IPHostEntry hostInfo = Dns.GetHostEntry(server);
            // Get the DNS IP addresses associated with the host.
            IPAddress[] IPaddresses = hostInfo.AddressList;

            // Evaluate the socket and receiving host IPAddress and IPEndPoint.
            for (int index = 0; index < IPaddresses.Length; index++)
            {
                hostAddress = IPaddresses[index];
                hostEndPoint = new IPEndPoint(hostAddress, conPort);
                Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                if (!s.Connected)
                {
                    continue;
                }
                s.Send(ASCII.GetBytes("un=" + username + ";pw=" + password));
                Int32 bytesGet = s.Receive(RecvBytes, RecvBytes.Length, 0);
                String get = ASCII.GetString(RecvBytes, 0, bytesGet);
                if (!get.Equals("allow"))
                {
                    return;
                }
                else
                {
                    loginb.Visible = false;
                }
            }
        }